Changchun flowmeter

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Which is a good flowmeter?

2. What are the manifestations of a broken air flow meter?

[Taipinglun Lead Ocean Automotive Network] When the air flow meter is broken, the engine will display abnormalities, often resulting in situations such as unstable idle, poor acceleration, "backfire" of the intake pipe, and black smoke from the exhaust pipe, while causing excessive exhaust emissions. Electronic controlled gasoline injection engines must accurately measure the amount of air inhaled into the engine at each moment in order to obtain the optimal concentration of the mixture under various operating conditions, which serves as the main basis for ECU calculation (control) of fuel injection quantity. If the air flow sensor or circuit malfunctions and the ECU cannot receive the correct intake signal, it will not be able to control the fuel injection amount normally, which will cause the mixture to be too rich or too lean, resulting in abnormal engine operation. Possible phenomena include: 1. Unstable idle speed, 2. Increased fuel consumption, 3. Weak acceleration, 4. Severe exhaust emissions pollution There are various types of air flow meters, and the damage situation is not the same. For example, the throttle installation is easy to place, the primary meter is less damaged, the secondary meter is more, and the primary meter may be worn or mechanically damaged. The same is true for bar flow meters. Vortex flow meters may experience sensor (temperature) wear due to dirty media, while rotor flow meters may experience air leakage and wear. Ultrasonic probe damage, glass casing damage (under pressure, external force), etc. (Image/Text/Photo: Hu Qiaoyun, Pacific Automotive Network)

3. How to calibrate a flow meter? In practical use, if the temperature, pressure, and properties of the medium are different from the calibration time, or if the flow meter wears out significantly after long-term use, or if a non-standard flow meter is manufactured by oneself, it is necessary to calibrate the flow meter and re determine its flow coefficient or calibration curve. The calibration methods for flow meters include volume method, weighing method, standard flowmeter method, etc. Each flowmeter undergoes strict calibration and testing before leaving the factory. However, due to changes in the environment and differences in installation conditions during use, especially in the potato mold conditions where the measured medium is significantly different from the original calibration medium, the flowmeter may have corresponding indication errors during the measurement process. If it is damaged, it needs to be re calibrated. Additional information: Flow measurement is widely used in various fields such as industrial and agricultural production, national defense construction, scientific research, foreign trade, and peoples daily lives. In the production of the petroleum industry, flow measurement runs through the entire process from oil extraction, transportation, refining and processing to trade and sales. Any link cannot be separated from flow measurement, otherwise the normal production and trade exchanges of the petroleum industry cannot be guaranteed. In the chemical industry, inaccurate flow measurement can cause an imbalance in the distribution ratio of chemical components, which cannot guarantee product quality and can even lead to production safety accidents. The measurement and regulation of the flow rate of liquid, gas, steam and

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